HIGH FREQUENCY MAGNETICS
T1/E1 Octal Transformer Modules
TM01108
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•
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Optimized for PMC-Sierra PM4318, 75Ω option
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Operating temperature range -40° to +85°C
Meets IEC 695, 2-2 flammability requirements
Eight transformers in one surface-mount package
Two modules:
PWB Process Capability: standard printed wiring board
assembly techniques, total-immersion cleaning
S553-6500-E3 with eight transformers
S553-6500-E4 with eight transformers and IC-side
surge protection devices
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Reliability testing: Shock, vibration, temperature cycling,
temperature - humidity - bias
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Four transformers have center taps to facilitate Simplex
line powering
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Interwinding breakdown voltage: 1500 Vrms min
Meets ITU-T G.703 return loss from -40° to +85° C
UL 1950 approved: S553-6500-E3 file number E150991
S553-6500-E4 pending
ELECTRICAL SPECIFICATIONS at 25° C
Primary
Inductance
at 10 kHz
Leakage
Inductance
at 1 MHz
DCR
Ω
max
Return Loss
at 102 kHz
Turns Ratio
Capacitance
pF max
±2%
75Ω Application1
Part Number
25° C
dB typ
-40 to +85° C
dB min
IC : Line
µH min
µH max
IC Side
Line Side
Winding
to
Winding
TX
RX
TX
950
950
RX
950
950
TX
0.3
0.3
RX
0.3
0.3
TX
RX
0.6
0.6
TX
RX
0.8
0.8
TX
RX
27
27
TX
18
18
RX
23
23
S553-6500-E3
S553-6500-E4
1 : 1.58 1 : 1.58
1 : 1.58 1 : 1.58
0.6
0.6
0.8
0.8
35
35
20
20
1. Terminated in 36 Ω for TX and 27 Ω for RX
S553-6500-E4
SCHEMATIC
S553-6500-E3
IC Side
Line Side
1 : 1.58CT
Line Side
IC Side
1 TXO+
40
1
2
1 TXI+
1 : 1.58CT
1 TXO+
40
1 TXI+
1
2
S
U
R
G
E
39 1 TXOCT
38 1 TXO-
1,2 3.3V
39 1 TXOCT
38 1 TXO-
1 TXI-
3
4
1 : 1.58CT
1 RXI+
1 RXICT
1 RXI-
37
36
35
1 RXO+
1 TXI-
3
4
1 : 1.58CT
1 RXI+
1 RXICT
1 RXI-
37
36
35
34
1 RXO+
5
6
1,2 GND
1 RXO-
5
6
7
P
R
O
T
E
C
T
I
1 : 1.58
1 : 1.58
1 RXO-
2 TXI+
34 2 TXO+
7
2 TXI+
1 : 1.58
1 : 1.58
2 TXO+
2 TXI-
33
32
8
9
2 TXO-
2 RXI+
2 RXO+
2 TXI-
33
32
8
9
2 TXO-
2 RXI+
2 RXO+
2 RXO-
2 RXO- 10
31 2 RXI-
1 : 1.58
31 2 RXI-
10
11
30 3 TXO+
3 TXI+
1 : 1.58
30 3 TXO+
3 TXI+ 11
29 3 TXO-
12
3 TXI-
O
N
1 : 1.58
3 RXO+ 13
3 RXO- 14
3 RXI+
28
3 TXI-
12
13
29
28
3 TXO-
3 RXI+
1 : 1.58
3 RXO+
27 3 RXI-
D
E
V
I
C
E
S
1 : 1.58CT
15
16
17
4 TXI+
3,4 GND
4 TXI-
26 4 TXO+
3 RXO- 14
27
3 RXI-
1 : 1.58CT
25
24
23
26 4 TXO+
4 TXOCT
15
16
17
4 TXI+
4 TXO-
4 RXI+
25
24
23
4 TXOCT
4 TXO-
4 RXI+
1 : 1.58CT
4 RXO+ 18
4 TXI-
1 : 1.58CT
22 4 RXICT
21
3,4 3.3V 19
4 RXO+ 18
19
20
4 RXI-
4 RXO-
22 4 RXICT
21
20
4 RXI-
4 RXO-
©2005 Bel Fuse Inc. Specifications subject to change without notice. 05.05
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
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